I created a page route to integrate my MVC application with a WebForms page that exist in my project:
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
// register the report route
routes.MapPageRoute("Reports","Reports","~/Pages/ReportViewer.aspx");
routes.MapRoute("Default","{controller}/{action}/{id}", new { controller = "Home", action = "Index", id = UrlParameter.Optional });
}This works when browsing to the specific url’s. However, I noticed this route created a problem whenever I use an Html.ActionLink in my Views:
<%: Html.ActionLink("Home", "Index", "Home") %>
When I load the page in the browser the link appears like:
http://localhost:12345/reports/test?action=Index&controller=Home
Unfortunately I can't place the route at the bottom, since the webform route has more specific parameters than the MVC route. I was able to solve this problem by introducing a new constraint.
I created a new constraint called IncomingRequestConstraint. This constraint simply return false for outgoing Urls(so that all Html helpers will work as expected).
public class IncomingRequestConstraint : IRouteConstraint
{
public bool Match(HttpContextBase httpContext, Route route, string parameterName, RouteValueDictionary values, RouteDirection routeDirection)
{
return routeDirection==RouteDirection.IncomingRequest;
}
}
In the global.asax, I added this constraint to the WebForms route:
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
// register the report routes
routes.MapPageRoute("Reports","Reports","~/Pages/ReportViewer.aspx", false, null, new RouteValueDictionary(new { controller = new IncomingRequestConstraint() }));